'overdramatic' originates from the prefix 'over-' meaning 'excessive' and the word 'dramatic' from Greek 'dramatikos', where 'drama' meant 'action or play'.

'dramatikos' transformed into the English word 'dramatic', and with the addition of the prefix 'over-', it became 'overdramatic'.

Initially, it meant 'excessively theatrical', but over time it evolved into its current meaning of 'excessively emotional or dramatic'.